import sys

sys.setrecursionlimit(10**7)
def I(): return int(sys.stdin.readline().rstrip())
def MI(): return map(int,sys.stdin.readline().rstrip().split())
def LI(): return list(map(int,sys.stdin.readline().rstrip().split()))
def LI2(): return list(map(int,sys.stdin.readline().rstrip()))
def S(): return sys.stdin.readline().rstrip()
def LS(): return list(sys.stdin.readline().rstrip().split())
def LS2(): return list(sys.stdin.readline().rstrip())


N = I()
V = [0]+LI()

if N == 1:
    print(V[1])
    print(1)
    exit()

dp = [0]*(N+1)
prev = [0]*(N+1)
dp[1] = V[1]
dp[2] = V[2]
for i in range(3,N+1):
    if dp[i-2] >= dp[i-3]:
        prev[i] = i-2
        dp[i] = dp[i-2]+V[i]
    else:
        prev[i] = i-3
        dp[i] = dp[i-3]+V[i]

if dp[-1] >= dp[-2]:
    ANS = [N]
    X = N
    while prev[X] != 0:
        ANS.append(prev[X])
        X = prev[X]
    ANS.reverse()
    print(dp[-1])
    print(*ANS)
else:
    ANS = [N-1]
    X = N-1
    while prev[X] != 0:
        ANS.append(prev[X])
        X = prev[X]
    ANS.reverse()
    print(dp[-2])
    print(*ANS)